Table 14. Explosives detected in soil under a 2.75-in. rocket low-order deto-
nation.
Concentration (g/g)
Depth
RDX
HMX
TNT
4-Am-DNT
2-Am-DNT
2,4-DNT
2,6-DNT
TNB
Surface
340
40
130
1.0
0.84
0.036
0.016
0.17
25 cm
2.4
0.61
0.28
0.065
0.084
<d
<d
<d
57 cm
0.38
0.057
0.013
0.015
0.024
<d
<d
<d
10 cm
0.031
0.031
<d
0.003
0.007
<d
<d
<d
1.0 g/g 4-Am-DNT, and 0.84 g/g 2-Am-DNT.
black powder burster charge. Red phosphorus is not
Subsurface soil at 10-cm depth contained 0.03 g/g
toxic; however, it will contain traces of white
RDX, 0.03 g/g HMX, 0.003 g/g 4-Am-DNT, and
phosphorus, which is very toxic by ingestion. We
0.007 g/g 2-Am-DNT. No TNT was detectable at 10-
collected a few of the pellets and the surface soil under
cm depth, indicating that migration was minimal. Given
the pile of pellets. Using SW846 Method 7580, we
the large decrease in concentration over only 10-cm
performed a headspace SPME analysis of the pellets
depth, migration of contaminants to groundwater is
and analyzed the soil for white phosphorus residues.
unlikely.
Although we detected white phosphorus in the vapor
phase above the pellets, no white phosphorus residues
Red phosphorus pellets
were found in the soil.
We found a pile of red phosphorus pellets from a
Background
smoke grenade (Fig. 22). Nomenclature on the grenade
was "GREN DSCHRG SMK SCR L8A3 VM GD 11/
The last series of samples was not associated with a
81 003." This kind of grenade is used to "provide a
specific event or the appearance of range scrap. These
self-screening smoke capability for armored/tactical
samples were meant to provide background
vehicles" (TM 43-0001-29 [U.S. Army 1994]). The
concentrations of metals and to provide information on
grenade is filled with 360 grams of red phosphorus/
what might be found using a grid node sampling
butyl rubber 95/5 that is supposed to be ignited by the
approach. We collected a sample of surface soil every
600,000
Soil Under 2.75-in. Rocket
Low-Order Detonation
500,000
400,000
300,000
200,000
100,000
0
2
6
10
14
18
Time (min.)
Figure 21. Chromatogram (GC-ECD) of solvent extract of soil col-
lected under a 2.75-in. rocket warhead containing Composition B.
25
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